I just bought a prepaid data package from Claro, one of the three mobile telcos here in Chile. After fumbling with their settings (their APN for prepago banda ancha is bap.clarochile.cl, not bam.clarochile.cl) I’ve just completed a successful call with my Teliax account on my Nokia E71 to my Vonage account. The chain involved goes something like this:
Nokia SIP call -> Claro 3.5G network -> internet cloud to the US -> Vonage -> more internet cloud back to Chile -> Tutopia DSL -> Cisco ATA 186 -> Philips VOIP841 wireless phone (for whom Vonage is my “landline”, I also have Skype running on it).
There’s probably 20,000 miles worth of roundtrip involved, with data packets going through air, copper and fiber. Try to visualize it. Read More